1.

Short pulsed gain-switched fiber laser with improved efficiency utilizing unabsorbed pump recovery

A simple solution for increasing the slope efficiency of a gain-switched fiber laser based on Yb-doped active fiber is presented. By adding a fiber amplifier stage, which recovers the unabsorbed pump light from the gain-switched oscillator, a significant increase in slope efficiency is achieved. The pulses at 1030-nm wavelength have an FWHM of 28 ns and a peak power of 2.3 kW.

F.01 Acquisition of new practical knowledge, information and skills

COBISS.SI-ID: 13647387

2.

Gain switch laser based on micro-structured Yb-doped active fiber

In this paper a near infrared gain-switched fiber laser based on oscillator stage only design with high peak power is presented. Output pulses reached 2.3 kW of peak power and duration of less than 60 ns. The dependence of the laser pulse duration on operation parameters was measured and theoretically explained. As the setup is based on flexible micro structured single polarization fiber, the laser output exhibits high polarization extinction ratio. Due to the narrow output spectrum the setup is suitable for second harmonic generation.

F.01 Acquisition of new practical knowledge, information and skills

COBISS.SI-ID: 13369371